Thalamus (torus/receptacle) is condensed end of floral axis on which floral leaves are inserted. This thalamus represents

Options

A. 4 internodes
B. 3 internodes
C. 2 internodes
D. 1 internodes

Answer

To answer the question regarding the thalamus (torus/receptacle) and its representation in terms of internodes and nodes, we can break down the solution into the following steps:

### Step-by-Step Solution:

1. **Understanding Thalamus**: The thalamus, also known as the torus or receptacle, is the thickened part of the floral axis where floral leaves (or appendages) are attached.

2. **Floral Appendages**: The floral leaves typically consist of four main parts:
- Calyx (sepals)
- Corolla (petals)
- Androecium (stamens)
- Gynoecium (carpels)

3. **Nodes and Internodes**: In the context of the thalamus:
- Each of the four types of floral appendages is attached at a node.
- Therefore, there are four nodes present in the thalamus.

4. **Counting Internodes**: The thalamus is described as having compressed internodes. Since there are four nodes, the number of internodes can be calculated as:
- Number of internodes = Number of nodes - 1
- Thus, 4 nodes - 1 = 3 internodes.

5. **Conclusion**: Therefore, the thalamus represents three internodes and four nodes.

### Final Answer:
The thalamus (torus/receptacle) represents **three internodes**.

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